The Shimano EZ Fire shifters are made up of two levers to operate the bike derailleurs. Move to an easier gear by pressing the thumb shifter, and move to a more difficult gear by pulling the lever on top of shifter on this Barracuda Montana Hard-tail Bike.For Downhill, Enduro, All mountain, Cross country racing, Cross country bike rides, the bike gets a Suntour XCE Alloy Suspension Fork which combines lightness with strength.Kenda MTB-specific tyres deliver impressive tread levels and outstanding grip to monster both trail and road conditions.Alloy hardtail MTB frame (18”)Front brake: zoom disc brakeRear brake: Tektro V power brakeGears: Shimano Altus 21-speed microshiftShifters: Shimano Altus EZ fire shiftersRims: 27.5” alloy rimsTyres: 27.5” x 2.10” Kenda MTB specificFork: Suntour XCE alloy suspension forkSaddle: padded MTB sport saddleA-head system stem 1/8 - 100mmZoom suspensionAlloy seatpostWeight: 19kgPlease Note: Due to ongoing issues in the supply chain, this bike is subject to specification changes without notice. Any changes made will be using equivalent or higher quality parts.**Some minor assembly is required. See our video (below) or consult our assembly guide for assistance.Unfortunately, we are not able to process faulty or warranty bike returns through our warehouse. If your bike develops a fault, please take it to your nearest GO Outdoors store where we have a full workshop and trained mechanics who will be able to assist you.Please note, this excludes Hathersage and Southport stores.